Westmoreland County's estimated 2025 population is 349,493 with a growth rate of -0.24% in the past year according to the most recent United States census data. Westmoreland County is the 11th largest county in Pennsylvania. The 2010 population was 365,029 and has seen a growth of -4.26% since that time.
Data after 2023 is projected based on recent change
The racial composition of Westmoreland County includes 92.57% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Black or African American
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 327,086 | 92.57% |
| Two or more races | 12,357 | 3.5% |
| Black or African American | 8,858 | 2.51% |
| Asian | 3,248 | 0.92% |
| Other race | 1,547 | 0.44% |
| Native American | 188 | 0.05% |
| Native Hawaiian or Pacific Islander | 61 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Westmoreland County's average per capita income is $50,881. Household income levels show a median of $72,468. The poverty rate stands at 10.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,763 | $131,032 |
| Families | $94,904 | $117,366 |
| Households | $72,468 | $95,075 |
| Non Families | $38,952 | $54,589 |
Average Income
Median Household Income
Poverty Rate